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Rezende, MVDS, Valerio, MEG and Jackson, RA ORCID: https://orcid.org/0000-0002-1163-6421
(2015)
Study of Eu3+ -> Eu2+ reduction in BaAl2O4:Eu prepared in different gas atmospheres.
Materials Research Bulletin, 61.
348 -351.
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Study of Eu3%2B- Eu2%2B reduction in BaAl2O4-Eu prepared in different gas atmospheres_RAJ proofed.pdf - Accepted Version Available under License Creative Commons Attribution. Download (352kB) | Preview |
Abstract
The effect of different gas atmospheres such as H2(g), synthetic air, carbon monoxide (CO) and nitrogen (N2) on the Eu3+ → Eu2+ reduction process during the synthesis of Eu-doped BaAl2O4 was studied using synchrotron radiation. The Eu3+ → Eu2+ reduction was monitored analyzing XANES region when the sample are excited at the Eu LIII-edge. The results show that the hydrogen reducing agent are the most appropriate gas for Eu2+ stabilization in BaAl2O4 and that only a part of the Eu ions can be stabilized in the divalent state. A model of Eu reduction process, based on the incorporation of charge compensation defects, is proposed.
Item Type: | Article |
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Uncontrolled Keywords: | Optical materials, XAFS (EXAFS and XANES), Optical properties |
Subjects: | Q Science > QC Physics Q Science > QE Geology |
Divisions: | Faculty of Natural Sciences > School of Physical and Geographical Sciences |
Related URLs: | |
Depositing User: | Symplectic |
Date Deposited: | 17 Feb 2015 16:59 |
Last Modified: | 15 May 2019 08:19 |
URI: | https://eprints.keele.ac.uk/id/eprint/288 |
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